That quote from Chalder: ''This is simply a rehabilitative treatment to help manage the symptoms more effectively.” is disingenuous, given her claims of 30% recovery.
Not only the recovery claims but the claims in the manuals (which they seem to have removed from public view) where CBT and GET claim to be curative where as APT and SMC claim to help with symptoms and allow the body time to recover. This difference in expectation setting is one of the things that is likely to introduce reporting biases into the subjective results.
They can't just tone down their claims because they were fundamental to the structure (and bias in outcomes) of PACE.